What metaphors are used in The Charge of the Light Brigade by Alfred Tennyson, 1st Baron Tennyson?

In lines 24-26, Tennyson expands the phrase that was used to end the first two stanzas: instead of the geographic "Valley of Death," he uses the metaphor "jaws of Death" and extends this metaphor with "mouth of hell." Treating death as the same thing as hell, and making both as real as an animal's attack, the poem heightens the viciousness of death on the battlefield.